Antimony |
| Symbol | Sb |
|---|---|
| Latin name | Stibium |
| Atomic number | 51 |
| Period | 5 |
| Element category | Metalloids |
| Relative atomic mass | 121.75 |
| Group | V.A |
| Electronegativity | 1.9 |
| Oxidation numbers | -3, 3, 5 |
| Electron configuration | 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 5s2 5p3 |
| Density [g/cm3] | 7.29 |
| State | Solid |
| Melting point [°C] | 630.74 |
| Boiling point [°C] | 1750 |
| Atomic radius [pm] | 133 |
| Covalent radius [pm] | 138 |
| Thermal conductivity [W m-1K-1] | 24.3 |
| Heat capacity [J K-1g-1] | 0.207 |
| Discovery | 1450 |
| Hardness [Mohs scale] | 3-3.5 |
| Brinell hardness [MPa] | 294 |
| Young's modulus [GPa] | 55 |
| Electrical conductivity [S m-1] | 2.5 · 106 |
| Shear modulus [GPa] | 20 |
| 1.st ionization energy [eV] | 8.64 |
| 2.nd ionization energy [eV] | 16.53 |
| 3.rd ionization energy [eV] | 25.3 |
| Stable isotopes | 2 |
| Unstable isotopes | 27 |